src/usr.bin/lex/flex.1 - diff

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Diff for /src/usr.bin/lex/flex.1 between version 1.35 and 1.36

version 1.35, 2014/02/12 12:32:41

version 1.36, 2014/02/14 17:15:11

Line 116

.It Sy Incompatibilities with Lex and POSIX

How

.Nm

differs from AT&T lex and the

differs from

.At

.Nm lex

and the

.Tn POSIX

lex standard.

.Nm lex

standard.

.It Sy Files

Files used by

.Nm .

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.Dq %pointer ,

unless the

.Fl l

lex compatibility option is used, in which case

.Nm lex

compatibility option is used, in which case

.Fa yytext

will be an array.

The advantage of using

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.Dv YYSTATE

as an alias for

.Dv YY_START

(since that is what's used by AT&T

(since that is what's used by

.At

.Nm lex ) .

.Pp

Note that start conditions do not have their own name-space;

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fault \- these sorts of errors should be reported to the email address

given below).

.It Fl l

Turns on maximum compatibility with the original AT&T

Turns on maximum compatibility with the original

.At

.Nm lex

implementation.

Note that this does not mean full compatibility.

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.Pp

In this section we discuss all of the known areas of incompatibility between

.Nm ,

AT&T

.At

.Nm lex ,

and the

.Tn POSIX

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.Pp

.Nm flex Ns 's

.Fl l

option turns on maximum compatibility with the original AT&T

option turns on maximum compatibility with the original

.At

.Nm lex

implementation, at the cost of a major loss in the generated scanner's

performance.